Americans spend $30 billion annually on alternative medicine

[Gawdzilla]

When?  Chiropracters consolidated their industry and business model (including profitable dependencies) in 1974 - and particularly so in "no-fault" states.

I went to the seminar in 1999, or thereabouts. So the suit was some time before that. 

Anecdote: My aunt was being seen by a chiro for a "bad back". She went to him twice a week for 24 weeks. On the last scheduled visit he "discovered" that she had "broken her leg" sometime in the past and needed to be treated for that. Another 48 visits. "I didn't even notice I'd broken it, I guess. It never bothered me, but he said I should have it treated." And so it goes.